Yeastar S2 Module up to 2 FXS Ports

Yeastar  S2 Module adds 2 FXS Ports for two traditional analog telephones to a Yeastar S Series PBX device. Supported Yeastar S Series models include Yeastar S20 IP PBX, Yeastar S50 IP PBX, Yeastar S100 IP PBX and Yeastar S300 IP PBX

Other Yeastar Modules that can increase capacity of Yeastar PBX

S2 Module 2 FXS Ports Add 2 Analog telephones	O2 Module 2 FXO Ports Connect 2 analog PSTN (POTS) lines.	SO Module 1 FXS Port & 1 FXO Port Unique PSTN Fallback Function	B2 Module 2 BRI Ports 2 x NT/TE BRI Ports
GSM Module 1 GSM Channel 1 Channel for GSM Voice Calls Frequency: 850/900/1800/1900 MHz (quad-band)	3G Module 1 WCDMA Channel 1 Channel for WCDMA Voice Calls Frequency: 900/2100 MHz, 850/2100 MHz, 850/1900 MHz	4G LTE Module 3G/4G Voice Call & Data Insert 4G module on Slot_1 of S20&S50 and Slot_1 of EXP 1 of S100&S300. Learn more.